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Published In: Annales Musei Botanici Lugduno-Batavi 2: 142. 1866. (Ann. Mus. Bot. Lugduno-Batavi) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 9/1/2009)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Introduced


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1. Kyllinga gracillima Miq.

Map 294

K. brevifolioides (Delahoussaye & Thieret) G.C. Tucker

Cyperus brevifolioides Delahoussaye & Thieret

C. brevifolius (Rottb.) Hassk. var. leiolepis (Franch. & Savigny) H. Hara

Plants perennial, with widely creeping, reddish brown rhizomes, forming mats. Aerial stems well spaced on the rhizomes, 4–25 cm long. Leaf blades 2–20 cm long, 2–4 mm wide. Inflorescences of 1 globose, headlike spike, 6–10 mm long, the bracts 1–13 cm long. Spikelets 3.5–4.5 mm long, the 2 larger scales ovate, folded lengthwise, the tip tapered to a point, tan to light brown, several-nerved, the broad midrib (keel) smooth (not toothed), green. Fruits 1.5–1.8 mm long, obovate in outline. September–October.

Introduced, uncommon in St. Charles County (native of eastern Asia, sporadically introduced in the eastern U.S.). Margins of ponds.

This species was first reported for Missouri by McKenzie and Jacobs (1996). It is closely related to K. brevifolia and has sometimes been treated as a variety of that species. Its presence in the United States was long overlooked, because the characters separating the two taxa are relatively subtle (Delahoussaye and Thieret, 1967). Kyllinga brevifolia tends to have fewer stamens and smaller fruits (1.0–1.3 mm), and the keel of the spikelet scales is usually toothed. This pantropical species grows natively in the southeastern United States (west to Oklahoma and Texas) and California and may eventually be found in Missouri. A single specimen of K. brevifolia at the University of Missouri Herbarium originated from weeds in Zoysia sod purchased in the St. Louis area and sent to the university for determination. However, there are no data on where or if this sod was subsequently cultivated, and there is no evidence that the population of Kyllinga became established or spread.



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